Torque

A ratio of an instrument’s torque output to the torque applied to the input, e.g., a torque multiplier’s output torque divided by its input torque

A test process measuring the accuracy of a torque wrench or other torquing device.

A test process that measures the accuracy of hydraulic torque wrenches where hydraulic pressure is applied to the torque wrench and it applies a known torque to the nut or bolt being tightened. This process usually is used to calibrate hydraulic torque wrenches producing a lookup sheet the operator can use to quickly look up the pressure required to correctly torque the bolt or nut.